current electricity Flashcards
1
Q
what does a voltmeter do
A
measures potential difference. it is always connected across a component this is known as in parallel
2
Q
what does an ammeter do
A
measures current. its always connected in line with a component this is known as series
3
Q
whats an electric current
A
flow of electric charge. current flows from positive to negative around a circuit
4
Q
whats potential difference
A
driving force that pushes the charge around. its unit is the volt V
5
Q
whats resistance
A
is anything in the circuit which reduces the flow of current. its measured in ohms
